Rooks, ravens and relations - BirdGuides
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Descrição
A comprehensive genetic analysis of all the recognised species and many subspecies of the cosmopolitan crow genus Corvus has been performed with some surprising results.
Details : Raven - BirdGuides
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The Rooks (Corvus frugilegus) Information
Details : Rook - BirdGuides
Details : Rook - BirdGuides
Compare Calls - Rook, Raven, Carrion Crow, Hooded Crow, Jackdaw
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